ABSTRACT
Machine-to-Machine (M2M) is a term used to describe the technologies that enable computers, embedded processors, smart sensors, actuators and mobile devices to communicate with one another, take measurements and make decisions—often without human intervention.
M2M technology was applied to five commercial buildings in a test. The goal was to reduce electric demand when a remote price signal rose above a predetermined price. In this system, a variable price signal was generated from a single source on the Internet and distributed using the meta-language, XML (Extensible Markup Language). Each of five commercial building sites monitored the common price signal and automatically shed site-specific electric loads when the price increased above predetermined thresholds. Other than price signal scheduling, which was set up in advance by the project researchers, the system was designed to operate without human intervention during the two-week test period.
Although the buildings responded to the same price signal, the communication infrastructures used at each building were substantially different. This study provides an overview of the technologies used to enable automated demand response functionality at each building site, the price server and each link in between. Network architecture, security, data visualization and site-specific system features are characterized.
The results of the test are discussed, including system architecture and characteristics of each site. These findings are used to define attributes of state-of-the-art automated demand response systems.
